Galera® has now been re-registered and has a new MAPP number 16413 with revised approved uses. This new label Galera (MAPP 16413) can only be used from 1st March and contains new approved uses. Read the product label before use.
Galera, based on clopyralid and picloram, is the main spring-applied herbicide for winter oilseed rape as it controls cleavers, mayweeds, sow-thistles and thistles, all weeds that compete with and interfere with the crop. It can be applied from the 4 leaf stage of the crop up to the point just before flower buds are visible above the crop canopy. Usually its cut off is at the end of March or beginning of April.
In practical terms, the trigger point for Galera applications tends to be when crops and weeds start to grow, usually after fertiliser applications.
In order to optimise performance, stable air temperatures of at least 6ºC and rising are needed, but preferably 8ºC or higher. The warmer and more stable conditions are, the better the results. Warm days and cold nights (high diurnal variation) do not suit Galera and weed control, particularly of cleavers, could be reduced. Mayweeds and thistle control is less affected.
Cleavers are the most aggressive and competitive weed, impacting yield and decreasing percentage oil content. They can also contaminate seed, increasing the risk of admixture and reducing the price/tonne. As well as being visible at flowering, these problem weeds make harvesting much more difficult and more costly. Controlling these weeds in oilseed rape will also minimise seed return across the rotation, helping to reduce the weed burden and herbicide spend in following crops – the Lifecycle approach.
Applied at 0.35 l/ha, Galera is approved for the control of cleavers, mayweeds, creeping thistles and sow-thistle. To get the best results on cleavers, conditions need to be warm before and after application, weeds should be actively growing and less than 150 mm in size. Groundsel is well controlled up to the 6 leaf stage.